Solid-State NMR Studies Reveal Native-like β-Sheet Structures in Transthyretin Amyloid
- East Carolina Univ., Greenville, NC (United States)
- National High Magnetic Field Lab. (NHMFL), Tallahassee, FL (United States)
- Scripps Research Inst., La Jolla, CA (United States)
- Univ. of California, Berkeley, CA (United States)
Structural characterization of amyloid rich in cross-β structures is crucial for unraveling the molecular basis of protein misfolding and amyloid formation associated with a wide range of human disorders. Elucidation of the β-sheet structure in noncrystalline amyloid has, however, remained an enormous challenge. Here we report structural analyses of the β-sheet structure in a full-length transthyretin amyloid using solid-state NMR spectroscopy. Magic-angle-spinning (MAS) solid-state NMR was employed to investigate native-like β-sheet structures in the amyloid state using selective labeling schemes for more efficient solid-state NMR studies. Analyses of extensive long-range 13 C- 13 C correlation MAS spectra obtained with selectively 13 CO- and 13 Cα-labeled TTR reveal that the two main β-structures in the native state, the CBEF and DAGH β-sheets, remain intact after amyloid formation. The tertiary structural information would be of great use for examining the quaternary structure of TTR amyloid.
- Research Organization:
- East Carolina Univ., Greenville, NC (United States); Scripps Research Inst., La Jolla, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; National Inst. of Health (NIH) (United States); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-05CH11231; NS084138; DK34909; AG10770; DK46335; DMR-1157490
- OSTI ID:
- 1377496
- Journal Information:
- Biochemistry, Vol. 55, Issue 37; ISSN 0006-2960
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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